Dell C521 specifications Back View of the Computer, Back Panel I/O Connectors

NOTICE: Ensure that there is a minimum of two inches of space between all vents and any object near these vents.

NOTICE: Keep the vent area clean and dust-free to ensure that the system is adequately ventilated. Use only a dry cloth to clean the vent area to avoid water damage to the system.

Back View of the Computer

1	voltage selection	See the safety instructions in the Product Information Guide for more
	switch	information.
2	power connector	Insert the power cable.
3	back panel I/O	Plug VGA, USB, and other devices into the appropriate connectors.
	connectors	See Back Panel I/O Connectors.
4	card slots (3)	Access connector slots for expansion cards:
		• SLOT1 PCI Express x16
		• SLOT2 PCI Express x1
		• SLOT3 PCI

Back Panel I/O Connectors

1	link integrity light	• Green — A good connection exists between a 10-Mbps
		network and the computer.
		• Orange — A good connection exists between a 100-Mbps
		network and the computer.
		• Off — The computer is not detecting a physical connection to
		the network.
2	network adapter
	connector
		NOTICE: Do not plug a telephone cable into the network
		connector.
		Use the network adapter connector to attach your computer to a
		network or broadband device. Connect one end of a network cable
		to either a network jack or your network or broadband device, and
		then connect the other end of the network cable to the network
		adapter connector on your computer. A click indicates that the
		network cable has been securely attached.
		On computers with an additional network connector card, use the
		connectors on the card and on the back of the computer when
		setting up multiple network connections (such as a separate intra-
		and extranet).